Top definition
To spend an outrageous amount of time in the restroom at your place of employment.

Usually involves defecation.
I can't hold this in any longer, will you watch the register for a while, I've got to go take a Kathmann.
or,

Karl always came to work about 20 minutes early, so he could take a Kathmann before clocking on.
by danjatron February 17, 2009
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